ASTM C1177/C1177M-13

Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing

ABSTRACT
This specification covers the requirements for glass mat gypsum substrates designed to be used as exterior substrate or sheathing for weather barriers. The substrates shall consist of a noncombustible water-resistant gypsum core, surfaced with glass mat partially or completely embedded in the core. Materials shall be sampled, tested, and conform accordingly to specified physical property (flexural strength, humidified deflection, nail pull resistance, water resistance, and core, end, and edge hardness) and dimensional (thickness, width, length, end squareness, and edges) requirements.
SCOPE
1.1 This specification covers glass mat gypsum substrate, which is designed to be used as an exterior substrate for a weather barrier.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

General Information

• Status: Historical
• Publication Date: 30-Sep-2013
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C11 - Gypsum and Related Building Materials and Systems
• Drafting Committee: C11.01 - Specifications and Test Methods for Gypsum Products

Relations

• Replaces: ASTM C1177/C1177M-08 - Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing
• Effective Date: 01-Oct-2013
• Replaced By: ASTM C1177/C1177M-17 - Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing
• Effective Date: 01-Dec-2017
• Referred By: ASTM C1516-05(2023) - Standard Practice for Application of Direct-Applied Exterior Finish Systems
• Effective Date: 01-Oct-2013
• Referred By: ASTM C1881-20 - Standard Guide for Closed-Loop Recycling of Scrap Gypsum Panel Products
• Effective Date: 01-Oct-2013
• Referred By: ASTM C1789-14(2018) - Standard Test Method for Calibration of Hand-Held Moisture Meters on Gypsum Panels
• Effective Date: 01-Oct-2013
• Referred By: ASTM C1280-18 - Standard Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing
• Effective Date: 01-Oct-2013
• Referred By: ASTM C1535-05(2023) - Standard Practice for Application of Exterior Insulation and Finish Systems Class PI
• Effective Date: 01-Oct-2013
• Referred By: ASTM C1289-23 - Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board
• Effective Date: 01-Oct-2013
• Referred By: ASTM C1397-13(2019) - Standard Practice for Application of Class PB Exterior Insulation and Finish Systems (EIFS) and EIFS with Drainage
• Effective Date: 01-Oct-2013
• Referred By: ASTM C1858-17a(2021) - Standard Practice for Design, Construction, and Material Requirements for Direct Hung Suspended T-bar Type Ceiling Systems Intended to Receive Gypsum Panel Products in Areas Subject to Earthquake Ground Motions
• Effective Date: 01-Oct-2013

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C1177/C1177M −13
Standard Specification for
1
Glass Mat Gypsum Substrate for Use as Sheathing
ThisstandardisissuedunderthefixeddesignationC1177/C1177M;thenumberimmediatelyfollowingthedesignationindicatestheyear
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 3. Terminology
1.1 This specification covers glass mat gypsum substrate, 3.1 Definitions shall be in accordance with Terminology
which is designed to be used as an exterior substrate for a C11.
weather barrier.
3.2 Definitions of Terms Specific to This Standard:
1.2 The values stated in either SI units or inch-pound units 3.2.1 glass mat, n—a mat of glass fibers with or without a
are to be regarded separately as standard. Within the text, the binder.
SI units are shown in brackets. The values stated in each
3.2.2 edge, n—the bound edge as manufactured.
system may not be exact equivalents; therefore, each system
3.2.3 weather barrier, n—a material that prevents the pas-
shall be used independently of the other. Combining values
sage of rain, sleet and snow.
from the two systems may result in non-conformance with the
standard. 4. Materials and Manufacture
1.3 The text of this standard references notes and footnotes 4.1 Glass Mat Gypsum Substrate shall consist of a noncom-
bustible water-resistant core, essentially gypsum complying
that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered with Specification C22, surfaced with glass mat partially, or
completely embedded in the core.
as requirements of the standard.
4.2 Glass Mat Gypsum Substrate, type X (special fire-
2. Referenced Documents
resistant) designates glass mat gypsum substrate complying
2
2.1 ASTM Standards: with this specification that provide not less than 1-h fire
5 3
C11 Terminology Relating to Gypsum and Related Building
resistance rating for substrate ⁄8 in. [15.9 mm] thick or ⁄4-h
1
Materials and Systems fire resistance rating for substrate ⁄2 in. [12.7 mm] thick,
C22 Specification for Gypsum applied parallel with and on each side of load bearing 2 by 4
C473 Test Methods for Physical Testing of Gypsum Panel wood studs spaced 16 in. [406 mm] on center with 6d coated
7
Products nails, 1 ⁄8 in. [48 mm] long, 0.0915 in. [2.3 mm] diameter
1
C645 Specification for Nonstructural Steel Framing Mem-
shank, ⁄4 in. [6.4 mm] diameter heads, spaced 7 in. [178 mm]
bers on center with glass mat gypsum substrate joints staggered 16
C1264 Specification for Sampling, Inspection, Rejection,
in. [406 mm] on each side of the partition and tested in
Certification, Packaging, Marking, Shipping, Handling, accordance with Test Methods E119.
and Storage of Gypsum Panel Products
NOTE 1—Consult manufacturers for independent test data on assembly
E119 Test Methods for Fire Tests of Building Construction
details and fire resistance ratings for other types of construction. See fire
and Materials
test reports or listings from recognized fire testing laboratories for
assembly particulars, materials, and ratings.
5. Physical Properties
1
This specification is under the jurisdiction of ASTM Committee C11 on
5.1 Specimens shall be taken from the samples obtained in
Gypsum and Related Building Materials and Systems and is the direct responsibility
of Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
accordance with Specification C1264.
Current edition approved Oct. 1, 2013. Published October 2013. Originally
5.2 Specimens shall be tested in accordance with Methods
approved in 1991. Last previous edition approved in 2008 as C1177/C1177M–08.
DOI: 10.1520/C1177_C1177M-13.
C473.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2.1 Flexural Strength—The specimens shall be tested face
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
up and face down. The average breaking load shall not be less
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. than the following:
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1177/C1177M − 13
6.2 Thickness, width, length and end squareness shall be
Method B
determined in accordance with Test Methods C473.
Load, lbf [N] Bearing Load, lbf [N] Bearing edges
1 7
6.2.1 Thickness—The nominal thickness shall be ⁄4, ⁄16,
Thickness, edges perpendicular to parallel to the substrate
1 5
in. [mm] the substrate edge edge ⁄2,or ⁄8 in. [6.4,11.1,12.7or15.9mm],withtolerancesinthe
1
nomina
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1177/C1177M − 08 C1177/C1177M − 13
Standard Specification for
1
Glass Mat Gypsum Substrate for Use as Sheathing
This standard is issued under the fixed designation C1177/C1177M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers glass mat gypsum substrate, which is designed to be used as an exterior substrate for a weather
barrier.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C22 Specification for Gypsum
C473 Test Methods for Physical Testing of Gypsum Panel Products
C645 Specification for Nonstructural Steel Framing Members
C1264 Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage of
Gypsum Panel Products
E119 Test Methods for Fire Tests of Building Construction and Materials
3. Terminology
3.1 Definitions shall be in accordance with Terminology C11.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 glass mat, n—a mat of glass fibers with or without a binder.
3.2.2 edge, n—the bound edge as manufactured.
3.2.3 weather barrier, n—a material that prevents the passage of rain, sleet and snow.
4. Materials and Manufacture
4.1 Glass Mat Gypsum Substrate shall consist of a noncombustible water-resistant core, essentially gypsum, gypsum complying
with Specification C22, surfaced with glass mat partially, or completely embedded in the core.
4.2 Glass Mat Gypsum Substrate, type X (special fire-resistant) designates glass mat gypsum substrate complying with this
5 3
specification that provide not less than 1-h fire resistance rating for substrate ⁄8 in. [15.9 mm] thick or ⁄4-h fire resistance rating
1
for substrate ⁄2 in. [12.7 mm] thick, applied parallel with and on each side of load bearing 2 by 4 wood studs spaced 16 in. [406
7 1
mm] on center with 6d coated nails, 1 ⁄8 in. [48 mm] long, 0.0915 in. [2.3 mm] diameter shank, ⁄4 in. [6.4 mm] diameter heads,
spaced 7 in. [178 mm] on center with glass mat gypsum substrate joints staggered 16 in. [406 mm] on each side of the partition
and tested in accordance with Test Methods E119.
NOTE 1—Consult manufacturers for independent test data on assembly details and fire resistance ratings for other types of construction. See fire test
1
This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
Current edition approved Sept. 15, 2008Oct. 1, 2013. Published October 2008 October 2013. Originally approved in 1991. Last previous edition approved in 20062008
as C11C1177/C1177M77/C 1177M–06.–08. DOI: 10.1520/C1177_C1177M-08.10.1520/C1177_C1177M-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1177/C1177M − 13
reports or listings from recognized fire testing laboratories for assembly particulars, materials, and ratings.
5. Physical Properties
5.1 Specimens shall be taken from the samples obtained in accordance with Specification C1264.
5.2 Specimens shall be tested in accordance with Methods C473.
5.2.1 Flexural Strength—The specimens shall be tested face up and face down. The average breaking load shall not be less than
the following:
...